11257537124 11257542292 8PCS Engine Piston Ring Kit For 550i 650i X5 E60 E61 E63 E65 E70 N62B48 4.8L Car Replacement Parts This 8-piece engine piston ring kit is designed for models equipped with the N62B48 4.8L V8 engine, including 550i, 650i, X5, E60, E61, E63, E65, and E70.The set includes eight pistons and rings, providing a complete solution for engine rebuilds or replacements. The kit features an engineered design to proper fitment within engine cylinders, supporting consistent and .The cylinder bore measures Φ93.00mm, with wrist pin diameters of Φ21mm and lengths of 54mm.Ring thicknesses are optimized for functional efficiency, with the first ring at 1.2mm, second ring at 1.5mm, and third ring at 2.4mm.This configuration helps reduce the risk of cylinder expansion and supports stable engine. Suitable for use during engine overhauls, this piston ring set is intended for individuals with mechanical experience.Compatibility should be verified prior to installation, particularly by checking vehicle identification details.The design and construction support function in applicable engine applications. ote: This is a third-party compatible part.Brand/model citations do not imply sponsorship or approval.